Fix PR3899: add support for extracting floats from vectors

when using -soft-float.
Based on a patch by Jakob Stoklund Olesen.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67996 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 9 insertions, 0 deletions

diff --git a/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp b/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp
index ce312ae8c8..8aa3e94002 100644
--- a/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp
+++ b/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp
@@ -59,6 +59,8 @@ void DAGTypeLegalizer::SoftenFloatResult(SDNode *N, unsigned ResNo) {
     case ISD::ConstantFP:
       R = SoftenFloatRes_ConstantFP(cast<ConstantFPSDNode>(N));
       break;
+    case ISD::EXTRACT_VECTOR_ELT:
+      R = SoftenFloatRes_EXTRACT_VECTOR_ELT(N); break;
     case ISD::FABS:        R = SoftenFloatRes_FABS(N); break;
     case ISD::FADD:        R = SoftenFloatRes_FADD(N); break;
     case ISD::FCEIL:       R = SoftenFloatRes_FCEIL(N); break;
@@ -113,6 +115,13 @@ SDValue DAGTypeLegalizer::SoftenFloatRes_ConstantFP(ConstantFPSDNode *N) {
                          TLI.getTypeToTransformTo(N->getValueType(0)));
 }
 
+SDValue DAGTypeLegalizer::SoftenFloatRes_EXTRACT_VECTOR_ELT(SDNode *N) {
+  SDValue NewOp = BitConvertVectorToIntegerVector(N->getOperand(0));
+  return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, N->getDebugLoc(),
+                     NewOp.getValueType().getVectorElementType(),
+                     NewOp, N->getOperand(1));
+}
+
 SDValue DAGTypeLegalizer::SoftenFloatRes_FABS(SDNode *N) {
   MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
   unsigned Size = NVT.getSizeInBits();